US9897734B2 - Polarizing film and display device having the polarizing film - Google Patents

Polarizing film and display device having the polarizing film Download PDF

Info

Publication number
US9897734B2
US9897734B2 US15/212,551 US201615212551A US9897734B2 US 9897734 B2 US9897734 B2 US 9897734B2 US 201615212551 A US201615212551 A US 201615212551A US 9897734 B2 US9897734 B2 US 9897734B2
Authority
US
United States
Prior art keywords
transparent substrate
polarizing film
retardation film
disposed
optical retardation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US15/212,551
Other versions
US20170351017A1 (en
Inventor
Hongqing Cui
Guowei Zha
Kaineng Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Assigned to WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD reassignment WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CUI, HONGQING, YANG, Kaineng, ZHA, GUOWEI
Publication of US20170351017A1 publication Critical patent/US20170351017A1/en
Application granted granted Critical
Publication of US9897734B2 publication Critical patent/US9897734B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • H01L51/5275—
    • H01L51/5281—
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133548—Wire-grid polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • G02F2001/133548—
    • G02F2001/133638—
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/01—Number of plates being 1
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/05—Single plate on one side of the LC cell

Definitions

  • the present application relates to a display technology field, and more particularly to a polarizing film and a display device having the polarizing film.
  • a polarizer is an important optical shutter in the display device. Controlling the polarization state of light can efficiently limit the specific polarizing light to pass or not.
  • Conventional polarizers are formed by organic materials and have the advantage of a mature manufacturing process, preparation in a large-scale area and good uniformity. But, the organic material has the problem of instable mechanical and optical properties, and will gradually deviate from the ideal optical and mechanical state as the external environment (such as temperature, humidity, air composition) changes or as time goes by. There are issues of the emergence of deterioration of uniformity, mechanical deformation, optical transmittance change or color differences.
  • the polarization rate and the transmittance rate is a contradiction, a good optical transmittance rate needs to reduce the thickness of the film, with the sacrifice of reducing the polarization rate.
  • the current thickness for polarizers in common is about 100 ⁇ m and it has become an important hurdle for a much thinner display.
  • the optical retardation films including quarter-wave plate and half-wave plate
  • the two films together will increase the thickness of the module.
  • the present application discloses a polarizing film and a display device including the polarizing film to solve the mechanical, optical and lifetime issues faced by the organic polarizing film, and to solve the problem of increasing the thickness of the transparent substrate by the manufacturing and the adhesive of the polarizer and the retardation film separately.
  • a technology approach adapted by the application is providing a polarizing film that includes: a transparent substrate; a linear polarizer disposed on the transparent substrate; an optical retardation film disposed on the transparent substrate; the linear polarizer includes a first dielectric layer covered on the transparent substrate and a metal layer disposed on the first dielectric layer; and the optical retardation film includes a second dielectric layer disposed on the transparent substrate.
  • the linear polarizer and the optical retardation film are disposed on the same or different side of the transparent substrate.
  • the metal layer of the linear polarizer is a periodically arranged striping metal wire, the period of the metal wire 122 is 20-500 nm, the duty ratio is 0.1 to 0.9 and the height of the metal wire 122 is 10-500 nm.
  • the material of the metal wire of the linear polarizer is selected from one or more than one composite from Al, Ag, and Au
  • the material of the dielectric layer is selected from one or more than one composite from SiO 2 , SiO, MgO, Si 3 N 4 , TiO 2 and of Ta 2 O 5 .
  • the second dielectric layer of the optical retardation film is a periodically arranged striping dielectric line, the period of the dielectric line is less than half wavelength of the incident light.
  • the period of the dielectric line of the optical retardation film is 100-700 nm, the duty ratio is 0.1 to 0.9 and the height of the dielectric line is 0.1-10 ⁇ m.
  • the material of the dielectric line of the optical retardation film is selected from one or more than one composite from PMMA, SiO 2 , SiO, MgO, Si 3 N 4 , TiO 2 and of Ta 2 O 5 .
  • the optical retardation film is set as a quarter-wave plate or a half-wave plate.
  • the striping direction of the metal wire and the dielectric line is parallel, perpendicular or obliquely arrangement.
  • a display device including a polarizer according to the polarizing film described above.
  • the advantage of the application is the polarizing film.
  • the polarizer and the optical retardation film By disposing the polarizer and the optical retardation film on the same transparent substrate, it can solve the mechanical, optical and lifetime issues faced by the conventional organic polarizing film, while solving the problem of the increased thickness of optical films owing to the manufacture and adhesion of polarizer and retardation film separately.
  • FIG. 1 is a schematic view of the structure of the polarizer of the present application
  • FIG. 2 is a schematic view of the structure of the retardation film of the present application.
  • FIG. 3 is a schematic view of the structure of the polarizing film according to the first embodiment of the present application.
  • FIG. 4 is a schematic view of the structure of the polarizing film according to the second embodiment of the present application.
  • FIG. 5 is a schematic view of the structure of the display device according to the first embodiment of the present application.
  • FIG. 6 is a schematic view of the structure of the display device according to the second embodiment of the present application.
  • FIG. 3 is a schematic view of the structure of the polarizing film according to the first embodiment of the present application.
  • the polarizing film includes a transparent substrate 11 , a linear polarizer 12 disposed on the transparent substrate 11 , and an optical retardation film 13 disposed on the transparent substrate 11 .
  • the linear polarizer 12 includes a first dielectric layer 121 covered on the transparent substrate 11 and a metal layer disposed on the first dielectric layer 121 and the metal layer is a periodically arranged striping metal wire 122 .
  • the optical retardation film 13 includes a second dielectric layer disposed on the transparent substrate 11 , and the second dielectric layer is a periodically arranged striping dielectric line 131 .
  • the linear polarizer 12 and the optical retardation film 13 are disposed on the same side of the transparent substrate 11 .
  • the transparent substrate 11 includes an upper surface and a lower surface, the linear polarizer 12 and the optical retardation film 13 are disposed on the upper surface of the transparent substrate 11 , or the linear polarizer 12 and the optical retardation film 13 are disposed on the lower surface of the transparent substrate 11 .
  • the difference between the polarizing film in the first embodiment and the polarizing film in the second embodiment is: the linear polarizer 12 and the optical retardation film 13 are disposed on different side of the transparent substrate 11 .
  • the transparent substrate 11 includes an upper surface and a lower surface, the linear polarizer 12 and the optical retardation film 13 are disposed on the upper surface and the bottom surface of the transparent substrate 11 separately.
  • the linear polarizer 12 is disposed on the upper surface of the transparent substrate 11 and the optical retardation film 13 is disposed on the bottom surface of the transparent substrate 11 .
  • the linear polarizer 12 is disposed on the bottom surface of the transparent substrate 11 and the optical retardation film 13 is disposed on the upper surface of the transparent substrate 11 .
  • the metal wire 122 is periodically disposed on the first dielectric layer 121 .
  • the polarizing light TM perpendicular to the polarizing direction of the striping metal wire 122 can be significantly pass through, and reflect the polarizing light TE parallel to the polarizing direction of the striping metal wire 122 .
  • the period of the metal wire 122 is 20-500 nm, wherein the period is the width of the metal wire 122 plus the distance between the metal wire 122 .
  • the duty ratio is 0.1 to 0.9 and the height of the metal wire 122 is 10-500 nm.
  • the material of the metal wire 122 is with larger imaginary part of the refractive index.
  • the material of the metal wire 122 is selected from one or more than one composite from Al, Ag, and Au.
  • the material of the first dielectric layer 121 is selected from one or more than one composite from SiO 2 (silicon dioxide), SiO (silicon oxide), MgO (magnesium oxide), Si 3 N 4 (silicon nitride), TiO 2 (titanium dioxide) and of Ta 2 O 5 (tantalum pentoxide).
  • the dielectric line 131 is periodically disposed on the transparent substrate 11 .
  • the refraction index of the Bloch wave supported by the dielectric line 131 is different from the TM and TE, namely birefringence, and the difference of the refractive index is usually about 0.01 to 0.2.
  • the period of the dielectric line 131 is 100-700 nm, wherein the period is the width of the dielectric line 131 plus the distance between the dielectric line 131 .
  • the duty ratio is 0.1 to 0.9 and the height of the dielectric line 131 is 0.1-10 ⁇ m.
  • the material of the dielectric line 131 is selected from one or more than one composite from polymethyl methacrylate, PMMA, SiO 2 , SiO, MgO, Si 3 N 4 , TiO 2 and of Ta 2 O 5 .
  • the difference of the refractive index and the width of the optical retardation film 13 can be set as a quarter-wave plate or a half-wave plate.
  • the striping direction of the metal wire 122 is parallel to the arranged striping direction of the dielectric line 131 , and the striping direction of the metal wire 122 and the striping direction of the dielectric line 131 should be arranged according to the required placement angle of the polarizer 12 and the optical retardation film 13 .
  • the manufacturing process and accuracy of the metal wire 122 is compatible with that of the dielectric line 131 , which can be prepared using the same processes, such as nano-imprint and the like.
  • the material of the transparent substrate 11 is selected from one or more than one composite from Polyethylene terephthalate, PET, and Polyethylene-Chlorinated, PEC.
  • FIG. 5 is a schematic view of the display device according to the first embodiment of the present application.
  • the display device is an OLED display device which includes a polarizing film, an OLED light emitting layer 14 , and a refraction layer 15 .
  • the polarizing film can be the polarizing film described in the above embodiment.
  • FIG. 6 is a schematic view of the display device according to the second embodiment of the present application.
  • the display device is a reflective display device which includes a polarizing film, a liquid crystal layer 16 , and a refraction layer 17 .
  • the polarizing film can be the polarizing film described in the above embodiment.
  • the polarizing film is formed by disposing the polarizer and the optical retardation film on the same transparent substrate, and thus it can solve the mechanical, optical and lifetime issues faced by the conventional organic polarizing film, while solving the problem of the increased thickness of optical films owing to the manufacture and adhesion of polarizer and retardation film separately.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)

Abstract

The present application discloses a polarizing film and a display device including the polarizing film. The polarizer includes a transparent substrate; a linear polarizer disposed on the transparent substrate; an optical retardation film disposed on the transparent substrate; the linear polarizer including a first dielectric layer covered on the transparent substrate and a metal layer disposed on the first dielectric layer; and the optical retardation film including a second dielectric layer disposed on the transparent substrate to solve the mechanical, optical and lifetime issues faced to the conventional organic polarizing film, while solving the problem of the increased thickness of optical films owing to the manufacture and adhesion of polarizer and retardation film separately.

Description

FIELD OF THE INVENTION
The present application relates to a display technology field, and more particularly to a polarizing film and a display device having the polarizing film.
BACKGROUND OF THE INVENTION
A polarizer is an important optical shutter in the display device. Controlling the polarization state of light can efficiently limit the specific polarizing light to pass or not. Conventional polarizers are formed by organic materials and have the advantage of a mature manufacturing process, preparation in a large-scale area and good uniformity. But, the organic material has the problem of instable mechanical and optical properties, and will gradually deviate from the ideal optical and mechanical state as the external environment (such as temperature, humidity, air composition) changes or as time goes by. There are issues of the emergence of deterioration of uniformity, mechanical deformation, optical transmittance change or color differences. On the other hand, the polarization rate and the transmittance rate is a contradiction, a good optical transmittance rate needs to reduce the thickness of the film, with the sacrifice of reducing the polarization rate. The current thickness for polarizers in common is about 100 μm and it has become an important hurdle for a much thinner display. Besides, the optical retardation films (including quarter-wave plate and half-wave plate) are also commonly used in the display device, usually used in conjunction with the polarizer, and the two films together will increase the thickness of the module.
SUMMARY OF THE INVENTION
The present application discloses a polarizing film and a display device including the polarizing film to solve the mechanical, optical and lifetime issues faced by the organic polarizing film, and to solve the problem of increasing the thickness of the transparent substrate by the manufacturing and the adhesive of the polarizer and the retardation film separately.
In order to solve the technical problem described above, a technology approach adapted by the application is providing a polarizing film that includes: a transparent substrate; a linear polarizer disposed on the transparent substrate; an optical retardation film disposed on the transparent substrate; the linear polarizer includes a first dielectric layer covered on the transparent substrate and a metal layer disposed on the first dielectric layer; and the optical retardation film includes a second dielectric layer disposed on the transparent substrate.
The linear polarizer and the optical retardation film are disposed on the same or different side of the transparent substrate.
The metal layer of the linear polarizer is a periodically arranged striping metal wire, the period of the metal wire 122 is 20-500 nm, the duty ratio is 0.1 to 0.9 and the height of the metal wire 122 is 10-500 nm.
The material of the metal wire of the linear polarizer is selected from one or more than one composite from Al, Ag, and Au, the material of the dielectric layer is selected from one or more than one composite from SiO2, SiO, MgO, Si3N4, TiO2 and of Ta2O5.
The second dielectric layer of the optical retardation film is a periodically arranged striping dielectric line, the period of the dielectric line is less than half wavelength of the incident light.
The period of the dielectric line of the optical retardation film is 100-700 nm, the duty ratio is 0.1 to 0.9 and the height of the dielectric line is 0.1-10 μm.
The material of the dielectric line of the optical retardation film is selected from one or more than one composite from PMMA, SiO2, SiO, MgO, Si3N4, TiO2 and of Ta2O5.
The optical retardation film is set as a quarter-wave plate or a half-wave plate.
The striping direction of the metal wire and the dielectric line is parallel, perpendicular or obliquely arrangement.
In order to solve the technical problem described above, another technology approach adapted by the application is providing a display device including a polarizer according to the polarizing film described above.
Compared to the conventional technology, the advantage of the application is the polarizing film. By disposing the polarizer and the optical retardation film on the same transparent substrate, it can solve the mechanical, optical and lifetime issues faced by the conventional organic polarizing film, while solving the problem of the increased thickness of optical films owing to the manufacture and adhesion of polarizer and retardation film separately.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more clearly illustrate the embodiments of the present application or prior art, the following figures will be described in the embodiments which are briefly introduced. It is obvious that the drawings are merely examples of some embodiments of the present application, and thus those of ordinary skill in this field can understand that these figures are not used to limit the present application.
FIG. 1 is a schematic view of the structure of the polarizer of the present application;
FIG. 2 is a schematic view of the structure of the retardation film of the present application;
FIG. 3 is a schematic view of the structure of the polarizing film according to the first embodiment of the present application;
FIG. 4 is a schematic view of the structure of the polarizing film according to the second embodiment of the present application;
FIG. 5 is a schematic view of the structure of the display device according to the first embodiment of the present application; and
FIG. 6 is a schematic view of the structure of the display device according to the second embodiment of the present application.
 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Embodiments of the present application are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. It is clear that the described embodiments are part of embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments to those of ordinary skill in the premise of no creative efforts obtained should be considered within the scope of protection of the present application.
Specifically, the terminologies in the embodiments of the present application are merely for describing the purpose of the certain embodiment, but not to limit the invention. Examples and the claims be implemented in the present application requires the use of the singular form of the book “an”, “the” and “the” are intend to include most forms unless the context clearly dictates otherwise. It should also be understood that the terminology used herein that “and/or” means and includes any or all possible combinations of one or more of the associated listed items.
Referring to FIGS. 1 to 3, FIG. 3 is a schematic view of the structure of the polarizing film according to the first embodiment of the present application. The polarizing film includes a transparent substrate 11, a linear polarizer 12 disposed on the transparent substrate 11, and an optical retardation film 13 disposed on the transparent substrate 11. As illustrated in FIG. 1, the linear polarizer 12 includes a first dielectric layer 121 covered on the transparent substrate 11 and a metal layer disposed on the first dielectric layer 121 and the metal layer is a periodically arranged striping metal wire 122. As illustrated in FIG. 2, the optical retardation film 13 includes a second dielectric layer disposed on the transparent substrate 11, and the second dielectric layer is a periodically arranged striping dielectric line 131.
In the present embodiment, the linear polarizer 12 and the optical retardation film 13 are disposed on the same side of the transparent substrate 11. The transparent substrate 11 includes an upper surface and a lower surface, the linear polarizer 12 and the optical retardation film 13 are disposed on the upper surface of the transparent substrate 11, or the linear polarizer 12 and the optical retardation film 13 are disposed on the lower surface of the transparent substrate 11.
As illustrated in FIG. 4, the difference between the polarizing film in the first embodiment and the polarizing film in the second embodiment is: the linear polarizer 12 and the optical retardation film 13 are disposed on different side of the transparent substrate 11. The transparent substrate 11 includes an upper surface and a lower surface, the linear polarizer 12 and the optical retardation film 13 are disposed on the upper surface and the bottom surface of the transparent substrate 11 separately. Such as the linear polarizer 12 is disposed on the upper surface of the transparent substrate 11 and the optical retardation film 13 is disposed on the bottom surface of the transparent substrate 11. Or the linear polarizer 12 is disposed on the bottom surface of the transparent substrate 11 and the optical retardation film 13 is disposed on the upper surface of the transparent substrate 11.
In the linear polarizer 12, the metal wire 122 is periodically disposed on the first dielectric layer 121. The polarizing light TM perpendicular to the polarizing direction of the striping metal wire 122 can be significantly pass through, and reflect the polarizing light TE parallel to the polarizing direction of the striping metal wire 122. The period of the metal wire 122 is 20-500 nm, wherein the period is the width of the metal wire 122 plus the distance between the metal wire 122. The duty ratio is 0.1 to 0.9 and the height of the metal wire 122 is 10-500 nm.
In the linear polarizer 12, the material of the metal wire 122 is with larger imaginary part of the refractive index. The material of the metal wire 122 is selected from one or more than one composite from Al, Ag, and Au. The material of the first dielectric layer 121 is selected from one or more than one composite from SiO2 (silicon dioxide), SiO (silicon oxide), MgO (magnesium oxide), Si3N4 (silicon nitride), TiO2 (titanium dioxide) and of Ta2O5 (tantalum pentoxide).
In the optical retardation film 13, the dielectric line 131 is periodically disposed on the transparent substrate 11. When the period of the dielectric line 131 is less than half wavelength of the incident light, the refraction index of the Bloch wave supported by the dielectric line 131 is different from the TM and TE, namely birefringence, and the difference of the refractive index is usually about 0.01 to 0.2.
In the optical retardation film 13, the period of the dielectric line 131 is 100-700 nm, wherein the period is the width of the dielectric line 131 plus the distance between the dielectric line 131. The duty ratio is 0.1 to 0.9 and the height of the dielectric line 131 is 0.1-10 μm.
In the optical retardation film 13, the material of the dielectric line 131 is selected from one or more than one composite from polymethyl methacrylate, PMMA, SiO2, SiO, MgO, Si3N4, TiO2 and of Ta2O5.
According to the difference of the refractive index and the width of the optical retardation film 13 can be set as a quarter-wave plate or a half-wave plate.
The striping direction of the metal wire 122 is parallel to the arranged striping direction of the dielectric line 131, and the striping direction of the metal wire 122 and the striping direction of the dielectric line 131 should be arranged according to the required placement angle of the polarizer 12 and the optical retardation film 13.
The manufacturing process and accuracy of the metal wire 122 is compatible with that of the dielectric line 131, which can be prepared using the same processes, such as nano-imprint and the like.
The material of the transparent substrate 11 is selected from one or more than one composite from Polyethylene terephthalate, PET, and Polyethylene-Chlorinated, PEC.
FIG. 5 is a schematic view of the display device according to the first embodiment of the present application. The display device is an OLED display device which includes a polarizing film, an OLED light emitting layer 14, and a refraction layer 15. The polarizing film can be the polarizing film described in the above embodiment.
FIG. 6 is a schematic view of the display device according to the second embodiment of the present application. The display device is a reflective display device which includes a polarizing film, a liquid crystal layer 16, and a refraction layer 17. The polarizing film can be the polarizing film described in the above embodiment.
The polarizing film is formed by disposing the polarizer and the optical retardation film on the same transparent substrate, and thus it can solve the mechanical, optical and lifetime issues faced by the conventional organic polarizing film, while solving the problem of the increased thickness of optical films owing to the manufacture and adhesion of polarizer and retardation film separately.
Above are embodiments of the present application, which does not limit the scope of the present application. Any modifications, equivalent replacements or improvements within the spirit and principles of the embodiment described above should be covered by the protected scope of the invention.

Claims (6)

What is claimed is:
1. A polarizing film, comprising:
a transparent substrate;
a linear polarizer disposed on the transparent substrate; and
an optical retardation film disposed on the transparent substrate;
wherein the linear polarizer includes a first dielectric layer disposed on the transparent substrate and a metal layer disposed on the first dielectric layer; and the optical retardation film c includes a second dielectric layer disposed on the transparent substrate;
the metal layer of the linear polarizer includes striping metal wires periodically arranged with a period of 20-500 nm, a duty ratio is 0.1 to 0.9 and a height of the metal wire is 10-500 nm;
the second dielectric layer of the optical retardation film includes striping dielectric lines periodically arranged with a period of 100-700 nm, a duty ratio is 0.1 to 0.9 and a height of the the dielectric line is 0.1-10 μm; and
the period of the dielectric lines is less than half wavelength of the incident light.
2. The polarizing film according to claim 1, wherein the linear polarizer and the optical retardation film are disposed on the same or different side of the transparent substrate.
3. The polarizing film according to claim 1, wherein the material of the metal wire of the linear polarizer is selected from one or more than one composite from Al, Ag, and Au, the material of the dielectric layer is selected from one or more than one composite from SiO2, SiO, MgO, Si3N4, TiO2 and of Ta2O5.
4. The polarizing film according to claim 1, wherein the material of the dielectric line of the optical retardation film is selected from one or more than one composite from PMMA, SiO2, SiO, MgO, Si3N4, TiO2 and of Ta2O5.
5. The polarizing film according to claim 1, wherein the optical retardation film is set as a quarter-wave plate or a half-wave plate.
6. A display device, wherein the display device comprising the polarizing film according to claim 1.
US15/212,551 2016-06-01 2016-07-18 Polarizing film and display device having the polarizing film Active US9897734B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201610382562.6A CN105866874B (en) 2016-06-01 2016-06-01 Polarizer and display device having the same
CN201610382562 2016-06-01
CN2016103825626 2016-06-01

Publications (2)

Publication Number Publication Date
US20170351017A1 US20170351017A1 (en) 2017-12-07
US9897734B2 true US9897734B2 (en) 2018-02-20

Family

ID=56676247

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/212,551 Active US9897734B2 (en) 2016-06-01 2016-07-18 Polarizing film and display device having the polarizing film

Country Status (2)

Country Link
US (1) US9897734B2 (en)
CN (1) CN105866874B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10578492B2 (en) * 2017-09-29 2020-03-03 Samsung Electronics Co., Ltd. Polarimeter for detecting polarization rotation
CN110927857A (en) * 2019-12-14 2020-03-27 浙江怡诚光电科技有限公司 Circular polarizing plate with brightening function for OLED display and application thereof
US12232357B2 (en) 2020-03-24 2025-02-18 Boe Technology Group Co., Ltd. Display device and display apparatus

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6590695B1 (en) * 2002-02-26 2003-07-08 Eastman Kodak Company Micro-mechanical polarization-based modulator
US20040095637A1 (en) * 2002-08-01 2004-05-20 Anguel Nikolov Precision phase retardation devices and method of making same
US7002742B2 (en) * 2000-09-20 2006-02-21 Namiki Seimitsu Houseki Kabushiki Kaisha Polarizing function element, optical isolator, laser diode module and method of producing polarizing function element
US8013953B2 (en) 2007-01-24 2011-09-06 Hitachi, Ltd. Polarizer and liquid crystal display device using same
CN202230278U (en) 2011-09-23 2012-05-23 京东方科技集团股份有限公司 A 2D/3D switching liquid crystal display panel and liquid crystal display
CN102540314A (en) 2010-12-31 2012-07-04 京东方科技集团股份有限公司 Polaroid and making method thereof, and 3D display device with polaroid
JP2013109110A (en) 2011-11-18 2013-06-06 Dainippon Printing Co Ltd Protective film and retardation plate in one for polarizer for 3-d spectacles and method for manufacturing lens for 3-d spectacles
US20150236300A1 (en) * 2012-09-03 2015-08-20 Idemitsu Kosan Co., Ltd. Organic electroluminescent element and electronic instrument
US20160011351A1 (en) 2013-03-06 2016-01-14 Nitto Denko Corporation Image display device
US20160025912A1 (en) 2013-12-10 2016-01-28 Boe Technology Group Co., Ltd. Multifunction packing film and display apparatus
US20160054496A1 (en) * 2013-05-08 2016-02-25 Fujifilm Corporation Circularly polarized light separation film, method for producing circularly polarized light separation film, infrared sensor, and sensing system and sensing method utilizing light
US20160356934A1 (en) 2014-12-30 2016-12-08 Boe Technology Group Co., Ltd. Circular polarizer and fabricating method thereof, as well as display panel
US20170038640A1 (en) 2015-08-03 2017-02-09 Boe Technology Group Co., Ltd. Array substrate, liquid crystal display panel and display device
US9588374B2 (en) 2014-02-19 2017-03-07 Lumentum Operations Llc Reflective LC devices including thin film metal grating
US9684177B2 (en) 2011-12-15 2017-06-20 Lg Display Co., Ltd. Polarization glasses type stereoscopic image display

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7002742B2 (en) * 2000-09-20 2006-02-21 Namiki Seimitsu Houseki Kabushiki Kaisha Polarizing function element, optical isolator, laser diode module and method of producing polarizing function element
US6590695B1 (en) * 2002-02-26 2003-07-08 Eastman Kodak Company Micro-mechanical polarization-based modulator
US20040095637A1 (en) * 2002-08-01 2004-05-20 Anguel Nikolov Precision phase retardation devices and method of making same
US8013953B2 (en) 2007-01-24 2011-09-06 Hitachi, Ltd. Polarizer and liquid crystal display device using same
CN102540314A (en) 2010-12-31 2012-07-04 京东方科技集团股份有限公司 Polaroid and making method thereof, and 3D display device with polaroid
CN202230278U (en) 2011-09-23 2012-05-23 京东方科技集团股份有限公司 A 2D/3D switching liquid crystal display panel and liquid crystal display
JP2013109110A (en) 2011-11-18 2013-06-06 Dainippon Printing Co Ltd Protective film and retardation plate in one for polarizer for 3-d spectacles and method for manufacturing lens for 3-d spectacles
US9684177B2 (en) 2011-12-15 2017-06-20 Lg Display Co., Ltd. Polarization glasses type stereoscopic image display
US20150236300A1 (en) * 2012-09-03 2015-08-20 Idemitsu Kosan Co., Ltd. Organic electroluminescent element and electronic instrument
US20160011351A1 (en) 2013-03-06 2016-01-14 Nitto Denko Corporation Image display device
US20160054496A1 (en) * 2013-05-08 2016-02-25 Fujifilm Corporation Circularly polarized light separation film, method for producing circularly polarized light separation film, infrared sensor, and sensing system and sensing method utilizing light
US20160025912A1 (en) 2013-12-10 2016-01-28 Boe Technology Group Co., Ltd. Multifunction packing film and display apparatus
US9588374B2 (en) 2014-02-19 2017-03-07 Lumentum Operations Llc Reflective LC devices including thin film metal grating
US20160356934A1 (en) 2014-12-30 2016-12-08 Boe Technology Group Co., Ltd. Circular polarizer and fabricating method thereof, as well as display panel
US20170038640A1 (en) 2015-08-03 2017-02-09 Boe Technology Group Co., Ltd. Array substrate, liquid crystal display panel and display device

Also Published As

Publication number Publication date
US20170351017A1 (en) 2017-12-07
CN105866874B (en) 2019-03-15
CN105866874A (en) 2016-08-17

Similar Documents

Publication Publication Date Title
CN102834750B (en) Manufacturing method of wire grid polarizer and liquid crystal display device
CN101617249B (en) Optical film and method for producing same
JP5794102B2 (en) Display device
CN105182613A (en) Optical structure, display substrate and display device
US10207645B2 (en) Vehicle including mirror with image display apparatus
CN102681078B (en) Grating polarizer
US9897734B2 (en) Polarizing film and display device having the polarizing film
CN107621666A (en) Ultra-thin wide-wave-range phase retardation film
CN112285971A (en) Polarizing structure and liquid crystal display device
US9891359B2 (en) Optical film, manufacturing method thereof, and display device including the same
CN106501894A (en) Polarization plates, antireflective layered material and image display system
KR102056902B1 (en) Wire grid polarizer and liquid crystal display panel and liquid crystal display device having the same
JP2007316156A5 (en)
US20130234966A1 (en) Optical element and display system
KR102186514B1 (en) Nonconductive low-reflection plate
US10514572B2 (en) Liquid crystal display device
JP2008009397A5 (en)
CN112147812A (en) A liquid crystal device on silicon
CN109212813B (en) Color film substrate and display device
CN215005946U (en) Phase retardation film and compensation film
JP2002031721A (en) Composite polarizing plate
WO2019100568A1 (en) Array substrate and manufacturing method therefor, flexible display panel and flexible display
KR101726472B1 (en) Polarizing plate having an excellent luminance property and display device comprising the same
CN115047552A (en) Phase retardation film and compensation film
US10254582B2 (en) Liquid crystal display device

Legal Events

Date Code Title Description
AS Assignment

Owner name: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., L

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CUI, HONGQING;ZHA, GUOWEI;YANG, KAINENG;REEL/FRAME:039177/0342

Effective date: 20160615

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8